I have seen over 6900 on Win7 on the same notebook with these clock settings, but 6577 is still OK.

Using an M11xR1 I could install Win10 without problems.
If you use the discrete Nvidia Graphics drivers, you should be fine.The problems starts with 'switchable' GPU as Intel does not support the GMA 4500M HD drivers on Windows 10.

With a bit of tooling around I could get the driver to work and a 1366x768 display, but as soon as I reboot the system it goes back to the 'basic' Microsoft screen driver and 1024x768 with no higher screen resolution available.

In the old days with beta Win10 I could get the whole switchable GMA/Nivida driver thing to work, but looks like with Windows 10 now, those days are gone.

I have my M11xR1 configured with Windows 10 and Windows 7 builds, as I don't want to lose Windows 7 until Windows 10 can give me an equal/better Windows experience.
This doesn't look very likely though.

But maybe there'll be an M11xR1 Champion, with good Windows skill who can engineer a few solutions. Fingers crossed.